Study on the brittleness reducing of C100 ultra-high strength concrete by adding steel fiber

Based on conventional technique and commonly materials,the ultra-high strength fiber reinforced concrete of C100 has been developed,the influence of fiber contents on the mechanical properties of concrete has been discussed,and the internal microscopic interface has been studied.The experimental results show that compressive strength of concrete at 28 d was over 100 MPa,and the maximum was up to 126.4 MPa;the strength value at 56 d was over 110 MPa,and the maximum was up to 133.0 MPa.The flexural strength and splitting tensile strength of concrete were enhanced with increasing steel fiber volume content,however,the elastic modulus appears to be decrease a little.